| A | B |
|---|
| Regulation | the control and coordination of all life activities. |
| Nervous system | invlves the three basic strucures, receptors, neurons, and effectors. |
| Receptors | specialized structures that are sensitive to changes in the external and internal environment. |
| Neurons | nerve cells. It is the basic unit of structure and function in the nervous system. |
| Effectors | are muscles or glands in which the neurons are attached to. |
| Nerve control | neurons are used for the transmission of impulses from one part of the body to another. |
| Impulse | electrochemical charge. |
| Stimulus | is a charge in the external or internal environment which initiates an impulse. ex. hot stove |
| Receptors | structures that are specialized to detect stimuli. |
| Dendrites | fibers that detect stimuli and generate an impulse toward the cyton. |
| Cyton | known as the cell body. Contains the nucleus of the neuron. |
| Axon | a fiber that transmits the impulse away from the cyton and towards the terminal branches. |
| Terminal branches | the ends of axons that secrete neurotransmitters. |
| Synapse | the gap between the terminal branches of one neuron and the dendrites of another neuron. |
| Neurotransmitters | chemicals secreted by the terminal branches that aid in the transmission of an impulse across the synapse. |
| Reflex Arc | involves receptors, sensory neurons, interneurons, motor neurons, and effectors. |
| Sensory neuron | carries impulses from the receptors toward the spinal cord and brain. |
| Interneuron | relays impulses from one neuron to another. |
| Motor neuron | carries impulses from the brain and spinal cord toward the effectors. |
| Schwan cells | the supporting cells associated with axons. |
